why its KeyError?

Question

i made this code;
students_dict={"eng": (3,89), "math":(4,60),"sport:(3,73)}
for i in range(len(student_dict)):
print(student_dict[ i ][ 1 ][ 0 ]
what I get is KeyError =0 , why I got error ? and what is mean keyerror=0 ?

Answer 1

because you are trying to search in a 3dimensional dict, but you only declared a 1d dict.
thats why you get the keyerror for 0, you would also get it for 1 and i.
to achieve what you want, try this:
for key in students_dict:
print(students_dict.get(key))

Answer 2

good explanation thank you😄